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04-14-2003, 12:24 AM | #1 |
Scooby Specialist
Member#: 2536
Join Date: Oct 2000
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SCIC
Location: Redondo Beach, CA
Vehicle:2012 STi Hatch SWP |
99rs bogging at 4k rpm?! need help!
i just read a thread where somebody's 99rs flies at 4k rpms...
HOWEVER, my friend has a 99rs with about 80k miles on it, and according to him (i haven't been in the car when this happens, so i don't exactly know what the feeling is...), it seems to lose power when trying to accelerate. example... he'll be pulling out of a parking lot, and the car will be at around 4k rpms, and when he floors it, it seems to have no power whatsoever; almost like it just loses power. sounds like it is bogging at that rpm. i have no idea what to tell him! no engine mods. just replaced the spark plugs and had a tune up... he said that helped, but now it's back. could it be a fuel pump problem??? he also said that he's getting the low fuel light right after he fills up the car to full sometimes... don't know if that changes anything. any help is greatly appreciated! thanks greg
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04-14-2003, 04:07 PM | #2 |
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anybody???
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04-14-2003, 04:32 PM | #3 |
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MAIC
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Vehicle:1967 Barracuda 2000 OBSTi |
Maybe fuel filter. Ever been changed?
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04-14-2003, 05:06 PM | #4 |
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actually, i think that when he got it tuned-up, that's one of the items he had changed... i can't be sure.
thanks greg |
04-14-2003, 07:17 PM | #5 |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
It's really hard to diagnose something like that if there is no check engine light coming on. It's been a long time since I was stock, but one thing that will help to open up the top end a bit would be a K&N panel filter in the first airbox (near the passenger side fender) and a gasket to replace the filter in the secondary air filter (inside the big plastic box just before the throttle body).
This may not fix the problem but it will help the breathing. On a car with that many miles it's hard to say what the problem might be. Did he buy it used? Also did he get the fuel injectors and fuel rails flushed as part of the tune up? That wouldn't be a bad idea either. |
04-14-2003, 07:34 PM | #6 |
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hey what's up fred...? i think you helped me out with something else before...
anywho, here's the complete deal: my friend bought the car from me, used. it already has the k&n panel filter in it (it's been in the car since at least 20k miles, if not more...). how long should those things last? and i will definately check the gasket on the secondary airbox. what about the filter in the secondary box? does that ever need replacing? and i'm gonna see the car tonight, so i'll ask the guy what the 'tune-up' included (fuel rails, injectors, etc.). otherwise, no CEL, just the whole fuel light thing... thanks in advance to anyone else who might have some insight! greg |
04-14-2003, 10:18 PM | #7 |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Make sure the K&N is properly cleaned and oiled. Get the recharge kit from wherever you got the filter. I think Pep-Boys carries it. Be careful not to over-oil! The filter in the secondary box might need replacement if it's dirty. Check it by shining a flashlight through it. I can't imagine that would be that dirty. You can get the gasket from Autocare Subaru.
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04-14-2003, 11:06 PM | #8 |
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I would check the MAF sensor first there was a recall on it a while ago and even try cleaning it once in a while.
http://forums.nasioc.com/forums/show...ight=maf+clean |
04-14-2003, 11:40 PM | #9 |
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Vehicle:2004 sti 07 Lexus Breakwater Blue |
MAF
call dealer with vin and they will tell you if it's under recall
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04-14-2003, 11:43 PM | #10 |
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when that recall first came out, i took it in to be replaced... you think it could still be that?
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04-15-2003, 02:29 AM | #11 |
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just drove the car... and this is what i posted on another board:
just drove it... let me try to describe it as best i can.
accelerating from a dead stop at a normal pace (not fast) the car seems totally fine. then shift into second and hammer the throttle: it accelerates smoothly but once the car reaches around 3500 to 4000 rpm, it seems to hesitate. basically the car jerks a little bit... maybe 2-3 times (not major, neck jerking stuff, but definately noticeable). then it keeps accelerating without a hitch. i don't know too much about how the fuel system works, but it SEEMS like the car might not be getting a sufficient amount of gas. but i really don't know. it seems like the car almost 'coughs' he recently had it serviced: distributor cap changed fuel filter changed spark plugs changed reset timing belt... basically a standard tune-up. the air filter was clean... no CEL but the fuel light comes on sometimes right after he fills up the tank to full. he did say that the 'hesitation' goes away after the cars been running for a while. maybe after it warns up (?). colin, do i owe you money for a consultation? and to anyone else who might be able to help, thanks! greg could it be fuel pump, fuel lines/rails, or injectors??? |
04-15-2003, 12:36 PM | #12 |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Distributor cap?
If the dealer told you he replaced that, you might want to go to another dealer next time. What you have described was what was happening to my car when the coil pack was going bad. Eventually, it only fired on 3 cylinders and threw a CEL for a misfire. Take the plug wires off of the coil pack and see if one of the terminals is discolored. The take the coil pack off and inspect it for tiny cracks. Mine was cracked on the bottom near the number 2 terminal which was green and nasty looking. Now if the dealer did replace the coil pack (and called it a distributor cap) I would take it back to the dealer and have them replace it if indeed it is bad. That is not something you replace at a normal tune up. They go for about $170 a pop, so you only replace it if it goes bad. Fred |
04-15-2003, 02:15 PM | #13 |
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fred: thanks, i will definately check it out...
that being said, i don't exactly know what they did to the distibutor cap, that's just what my friend said. i'll definately get that clarified. also, COIL PACK. i don't know what that is exactly (call me stupid ). could you describe it??? again, i really appreciate the help fred. greg |
04-15-2003, 04:42 PM | #14 |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
The coil pack is what the RS has in place of the distributer cap. There is no distributer cap. The coil pack is what the other end of the spark plug wires are connected to. It's a black box located on the top front of the intake manifold and has 4 spark plug wires connected to it. Pull the plug wires off of it one at a time and check to see what the terminals on the coil pack look like. They should be nice shiney brass color. If one is corroded and green, that's a dead givaway. Even if they all look good, take it off and inspect it foir cracks. It's held on with only two bolts. Just remeber where each plug wire goes (it's pretty obvious really)
Good luck Fred |
04-16-2003, 12:52 AM | #15 |
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worse nitemare coming true???
yep...
like i said, i sold this car to my friend in good faith. it ran fine while i owned it... but apparently, unbeknownst to me, the coil pack was on its last leg. as of tonight, the car is CELing it left and right (yeah, basically my friend isn't driving it until it gets fixed...) and basically the car sounds like it's dying. pop the hood, and blue sparks running up and down the wires from the coil pack (yeah, before today, my friend and i didn't even know what a coil pack was...!). and there's been a lotta moisture in the air the last week or so here in socal. so, there you have it... so, fred, you diagnosed it on the dot it sounds like! bad coilpack. next step: figurin out how to fix it. need to get my hands on a new coilpack... any suggestions? is this something that i could do on my own??? i know i'm not that mechanically savy, but we're talkin four wires, a coilpack and two bolts right? anywho, any suggestions at this point are GREATLY appreciated. greg |
04-16-2003, 08:24 AM | #16 | |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Re: worse nitemare coming true???
Quote:
You might save some money by getting the coil pack from Subaruparts.com I think they have a parts search feature, or if you can get the part number you can look it up by that. they usually beat the hell out of any dealership prices. |
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04-16-2003, 11:34 AM | #17 |
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Join Date: May 2000
Location: Purcellville VA USA
Vehicle:2011 X5 Diesel Space Gray |
I don't know about anyone else but I'm a firm believer in Resetting the ECU. Let me list my reasons:
1. takes one 10mm wrench and 10sec. to detatch the terminal and 59mins and 50sec. to wait. I say do this when you are in the mood to hit up the head or want to do some simple chores. 2. with my experiance with subie is that after any kind of performance upgrade to reset the ecu. if you can see that a tune-up is a performance upgrade then there goes that idea to reset the ecu. (spark plugs and replacing filters in my book is considered an upgrade) 3. it wouldn't hurt the car and since you are not getting an accurate reading (ie. no cel, which is odd; subies are very sensetive) resetting the ecu will make the ecu relearn and remap the car to the proper settings. 4. re- fur to 1. Serriously, I had the same thing... just reset the ecu and bam! back to new! Give it a try... can't hurt... plus I recomend going out for mexican and then trying the ecu reset. The mexican will help occupy your time. Usually does it for me... Good Luck |
04-16-2003, 11:43 AM | #18 |
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Vehicle:2011 X5 Diesel Space Gray |
WOW should have read futher down... that sux man
from reading that... I'd say screw that.... call the dealership and raise hell.... might get way with a free job and parts.... christ they did the tune up and didn't notice something like that..... I say just raise hell... if that doesn't work... I'd say do it yourself... its fun and a learning experiance... coil pack from Subieparts should be pretty cheep....then I'd get new wires like what's his name said but I'd upgrade it to magnacore wires... why not upgrade to race quailty, right? well good luck... and if its all dicked up I'd even go ahead and replace the plugs "NGK plugs"... they may have gotten screw'd up in the process of killing your engine... just an idea |
04-16-2003, 12:21 PM | #19 | |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Quote:
As for raising hell with the dealer, well I still have a problem with the fact he told you he replaced the distributor cap. Either he thinks you are stupid and he's lying to you to make more money, or he is just and idiot. I think it would definitely be worth raising a little hell, they should have caught the problem. |
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04-16-2003, 12:31 PM | #20 |
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thanks everybody... is there a technical term for 'coil pack'
i did a search on it on subaruparts.com and couldn't find anything... i'm still searching but right now, nothing. oh, and i did a search and found alot of information re: similar situations with 99s... it really seems like a coilpack problem. i'm hoping maybe it's just the wires, but we'll see. |
04-16-2003, 12:55 PM | #21 | |
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Join Date: May 2000
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Quote:
Magnacore wires... ahh come on... they are thicker than stock... larger guage... gots ta help something... yea I didn't really notice anything either but it sure as hell makes me beleive that I did something better than stock. NGK irradiums would be cool... and atleast we see eye to eye on that selection... Sorry again.. didn't mean to step on your toes. Rudy |
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04-16-2003, 12:57 PM | #22 | |
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Quote:
Rudy Happy hunting |
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04-16-2003, 01:21 PM | #23 |
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first of all, let me clarify... when i asked about the distributor cap issue, my friend said that he just assumed that they replaced that becuase "that's what they do during a tune-up, right?"
so, in fact, that he was never told that they replaced the 'distributor cap'. although if there is a problem with the wires and coilpack, shouldn't that have been assesed by the individual who did the tune-up less than a month ago? oh, and i'll try giving subaruparts a call. thanks greg |
04-16-2003, 01:23 PM | #24 | |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Quote:
Magnacore's really only will help you if you upgrade the whole ignition system (hotter coils) other than that you're going to end up with the same spark as with stock wires. Not noticeably hotter anyway. The NGK's I like are the copper core V-Power. I change my plugs every 30-32K, so no reason to get too fancy. |
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04-16-2003, 01:28 PM | #25 | |
Gone... But not forgotten
Member#: 92
Join Date: Jul 1999
Location: East Detroit, Michigan
Vehicle:1999 2.5RS Coupe Blueish Kind of |
Quote:
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